tree 274545ab1eed32ac6528047ad363c169753b1f7e
parent 7453c549f5f6485c0d79cad7844870dcc7d1b34d
author Nikita Yushchenko <nikita.yoush@cogentembedded.com> 1484160991 +0300
committer Konrad Rzeszutek Wilk <konrad@kernel.org> 1484501844 -0500

swiotlb: ensure that page-sized mappings are page-aligned

Some drivers do depend on page mappings to be page aligned.

Swiotlb already enforces such alignment for mappings greater than page,
extend that to page-sized mappings as well.

Without this fix, nvme hits BUG() in nvme_setup_prps(), because that routine
assumes page-aligned mappings.

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>